Hello everybody on the forum! this is my first post

Straight to business, I'm having an issue with F:NV DLCs I installed from the Ultimate Edition disc...I tried Dead Money and Old World Blues, still didn't have the chance to test Honest Hearts and Lonesome Road but I think it'd be quite the same result...

Basically every time I try to start the DLC quest the game freezes BEFORE the loading screen and the cutscene and I have to reboot the console...when I activate and inspect the crashed satellite of Old World Blues the game freezes during the blue flashes and doesn't make it even to the loading screen or the cutscene, same thing with Dead Money, when I enter the abandoned BoS bunker and walk close to the radio, the gas start pouring in and the game freezes...and I have to reboot the console

I tried loading both of them many times, cleared the cache, reinstalled the DLCs, removed the patch, cleared the cache again, reinstalled the patch but it never worked and never even got to the DLC loading screen.

Then I tried creating a new character and rushing all the way down to start Old World Blues right after leaving Doc Mitchell's house and...it worked, loading screen appeared and cutscene started..!

So I'm guessing...do I have a corrupted savegame? I never had game freezes before, infinite loading screen or the savegame corrupted file message... what can I do?

Is there a way to play the DLCs with my main 50+ hours character? Would be bothering if I had to create a brand new character just to play through the DLC!

Any help would be greatly appreciated and my next round at the Tops bar would be on me...!

So, I tried to start Dead Money again yesterday this time with empty inventory (only quest items I couldn't drop) and...bam, it worked! Loading screen and cutscene went fine and I was able to start playing after the dialog with father Elijia or whatever. So all exited I reloaded and tried up Old World Blues always with the empty inventory and...it froze. Rebooted and tried again with Dead Money and this time it froze.
Seriously, WTF?
This thing is getting quite annoying, can anyone help?